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How to Wire a 12-Volt 5-Pin Relay (4 Steps) | eHow
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日期：2025-10-14
Relays are special switches designed to allow a small circuit to control a larger circuit. These devices use a solenoid to control a heavy-duty switch. The wiring for the solenoid may require only 0.5 amps to activate, while the switch it controls carries...看更多
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